6978040 has 32 divisors (see below), whose sum is σ = 16069680. Its totient is φ = 2725632.

The previous prime is 6978031. The next prime is 6978047. The reversal of 6978040 is 408796.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6977987 and 6978005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6978047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309 + ... + 3748.

Almost surely, 2^6978040 is an apocalyptic number.

It is an amenable number.

6978040 is an abundant number, since it is smaller than the sum of its proper divisors (9091640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6978040 is a wasteful number, since it uses less digits than its factorization.

6978040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4111 (or 4107 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 6978040 is about 2641.5980012106. The cubic root of 6978040 is about 191.0928707828.

The spelling of 6978040 in words is "six million, nine hundred seventy-eight thousand, forty".